Many of us don't have a time period for what our layout is in, since that would mean limiting what trains we want to run. However, of all the layouts I've seen, the majority of them seem to be set in Summer. They have big, bright green trees, at least one crowded beach scene, and a sunny feeling with the rest of the scenery and types of trains.
Overall, I prefer my layout to be Winter themed as I love Christmas and love using Dept. 56 buildings to add life to the layout. Plus, you can do a lot of realistic whimsy with snowy layouts. Although, I will say that Fall layouts are also quite unique when you have multi-colored trees in red, orange and yellow, and can do some Halloween themes.
But, that's my opinion. What season do you like your layout to be?
